When you share a link to a question that gets deleted, any user without enough reputation sees a page that states the question had been there but is now removed. (I'm assuming the ability to see deleted answers is defined by the reputation but it doesn't make any difference, though).
However, when you share a link to an answer that gets deleted, navigating to that link will get you to the question without any notice that the link is actually an answer that got deleted. I can confirm in this case that if you have reputation enough you can see the question. However, when sharing via any social network, it won't be the case for most users.
Shouldn't this answers behaviour be similar to the questions one?
PS: Just an additional and probably unrelated question: Does it make sense to be able to share deleted Q&A? I know you could get around this by first sharing and then deleting but not allowing the user to share deleted Q&A would at least make things harder for the user to brake.